Cluster temperature profiles and Sunyaev-Zeldovich observations

Abstract

Galaxy clusters are not iso-thermal, and the radial temperature dependence will affect the cluster parameters derived through the observation of the Sunyaev-Zeldovich (SZ) effect. We show that the derived peculiar velocity will be systematically shifted by 10-20%. For future all-sky surveys one cannot rely on the observationally expensive X-ray observations to remove this systematic error, but one should instead reach for sufficient angular resolution to perform a deprojection in the SZ spectra. The Compton weighted electron temperature is accurately derived through SZ observations.

4 pages, 1 figure, minor typos corrected

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Cited by in corpus (17)

• Astrophysics with the Spatially and Spectrally Resolved Sunyaev-Zeldovich Effects: A Millimetre/Submillimetre Probe of the Warm and Hot Universe
• Planck's view on the spectrum of the Sunyaev-Zeldovich effect
• Effects of sub-mm and radio point sources on the recovery of Sunyaev-Zeldovich galaxy cluster parameters
• Measuring cluster peculiar velocities with the Sunyaev-Zeldovich effects: scaling relations and systematics
• Relativistic SZ temperature scaling relations of groups and clusters derived from the BAHAMAS and MACSIS simulations
• Trouble for cluster parameter estimation from blind SZ surveys?
• A multi-simulation study of relativistic SZ temperature scalings in galaxy clusters and groups
• The Sunyaev-Zel'dovich temperature of the intracluster medium
• Constrained Cluster Parameters from Sunyaev-Zel'dovich Observations
• The estimation of the SZ effects with unbiased multifilters
• On the ability of spectroscopic SZ effect measurements to determine the temperature structure of galaxy clusters
• Study on the Solutions of the Sunyaev-Zeldovich Effect for Clusters of Galaxies
• Systematic Errors in Sunyaev-Zeldovich Surveys of Galaxy Cluster Velocities
• Analytical studies on the Sunyaev Zeldovich effect in the cluster of galaxies for three Lorentz frames
• Unveiling the 3D temperature structure of galaxy clusters by means of the thermal SZ effect
• Analytical studies on the Sunyaev-Zeldovich effect in the cluster of galaxies for three Lorentz frames II: single integral formula
• Infall near clusters of galaxies: comparing gas and dark matter velocity profiles